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GA3219 GA3218 GA3217 VentureDigital System
GA3219 GA3218 GA3217 Preliminary Data Sheet Features SoundDesignAdvanced Research 128-band adaptive noise reduction adaptive feedback cancellation Description Venture Gennum's premiere product designed Voyageurplatform. Combining power capabilities Voyageur together with SoundDesign Advanced Research, Venture delivers cutting-edge features high performance. Voyageur Gennum's industry-leading programmable digital signal processing platform. SoundDesign Advanced Research Gennum developed methodology that couples state-of-the-art acoustic algorithms ensure high-fidelity digital sound quality. Venture's adaptive noise reduction preserves perceived speech levels without causing distortion. monitors noise levels independently individual bands. This strategy also employs advanced psychoacoustic models eliminate audible noise reduce amount perceptible artifacts introduced noise reduction process. Based phase cancellation method, Venture's adaptive feedback reduction algorithm provides increased maximum stable gain unlike other feedback strategies. Additionally, features rapid adjustment dynamic feedback situations resistance tonal inputs. addition these adaptive algorithms, Venture also supports following features: FRONTWAVE directional processing, cross fading between audio paths click-free memory changes, 8-band graphic equalizer, generic biquad filters (configurable parametric other filter types), programming speed enhancements, optional peak clipping, flexible compression adjustments, programmable tones memory change battery indicators, wideband gain, volume control industry-leading security features avoid cloning software piracy. Available Venture configurations: GA3219: Adaptive noise reduction adaptive feedback canceller GA3218: Adaptive noise reduction GA3217: Adaptive feedback canceller
128-bit fingerprint security system other security features protect against device cloning software piracy soft acoustic fade between memory changes FRONTWAVE® directional processing high fidelity audio CODEC 20-bit audio precision 95dB input dynamic range with HRXHeadroom Extension channel WDRC compression 8-band graphic biquadratic filters drives zero-bias 2-terminal receivers analog inputs fully configurable memories with audible memory change indicator memory select pads internal external volume control AGCo with variable threshold, time constants, optional adaptive release 16kHz 8kHz bandwidth optimized programming speed thinSTAXpackaging
thinSTAX PACKAGING Hybrid typical dimensions: 0.215 0.124 0.065in. 5.46 3.15 1.65mm
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GA3219 GA3218 GA3217 Preliminary Data Sheet
Block Diagram
TONE GENERATOR
CIRCUITRY
VREG
VOLTAGE REGULATOR
MEMORY SELECT POST BIQUAD FILTERS CROSS FADER
PEAK CLIPPER
HBRIDGE
OUTOUT+
FMIC RMIC
MIC/TELECOIL COMPENSATION
BIQUAD FILTERS
AGCO
VOLUME CONTROL
POST BIQUAD FILTERS CONTROL
PGND
FEEDBACK CANCELLER
WIDEBAND GAIN
MGND FREQUENCY BAND ANALYSIS PROGRAMMING INTERFACE bands FREQUENCY BAND SYNTHESIS WDRC (1,2,4 channels) Noise Reduction (128 bands) CLOCK GENERATOR Graphic bands) EEPROM
Hybrid block diagram
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GA3219 GA3218 GA3217 Preliminary Data Sheet
Contents
Features thinSTAX PACKAGING.1 Description Connection.4 Absolute Maximum Rating Electrical Characteristics Typical Applications Venture Overview.9 Signal Path.10 Functional Block Description Adaptive Feeback Canceller Adaptive Noise Reduction Converters Head Room Expander FRONTWAVE Directionality Channel Processing Telecoil Path Graphic Equalizer Biquad Filters 7.10 Volume Control 7.11 AGCo Peak Clipper 7.12 Memory Select Switches 7.12.1 Momentary Switch MS.16 7.12.2 Momentary Switch Static Switch (jump last memory) 7.12.3 Static Switch 7.12.4 Static Switch Static Switch (jump last memory) 7.13 Audible Memory Change Indicator 7.14 Tone Generator 7.15 Cross Fader 7.16 Power-On/Power-Off Behavior Battery Indicator 7.17 Software Security 7.18 Communication 7.19 Power Management Package Dimensions Location Revision History
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GA3219 GA3218 GA3217 Preliminary Data Sheet
Connection
PGND OUT+ RMIC FMIC
OUT-
MGND
VREG
Figure 1-1: Connection
Absolute Maximum Rating
Parameter
Operating Temperature Range Storage Temperature Range Absolute Maximum Power Dissipation Maximum Operating Supply Voltage Absolute Maximum Supply Voltage
Value
40°C -20°C 70°C 25mW 1.5VDC 2VDC
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GA3219 GA3218 GA3217 Preliminary Data Sheet
Electrical Characteristics
Table 3-1: Electrical Characteristics
Conditions: VBAT 1.25V Temperature 25°C
Parameter
Hybrid Current
Symbol
IAMP IAMP
Conditions
With adaptive features 8kHz bandwidth With adaptive features 16kHz bandwidth Ramp down Ramp 32kHz sampling rate -40dBV -15dBV,
0.93 1.06 100k 1.945
1150 0.95 2.048
0.97 1.16 2.151
Units
cycles
Minimum Operating Supply Voltage Supply Voltage Turn Threshold EEPROM Burn Cycles Frequency System Bandwidth High Frequency System Bandwidth Total Harmonic Distortion Maximum Input Clock Frequency
VBOFF VBON THDM fclk
Regulator
Regulator Voltage VREG 0.87 0.90 0.93
Input
Input Referred Noise Input Impedance Anti-aliasing Filter Rejection Maximum Input Level Input Dynamic Range Dynamic Range Bandwidth 100Hz 8KHz 8kHz, -40dBV Bandwidth 100Hz 8KHz Bandwidth 100Hz 8KHz -106
Output
Dynamic Range Output Impedance ZOUT
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GA3219 GA3218 GA3217 Preliminary Data Sheet
Table 3-1: Electrical Characteristics (Continued)
Conditions: VBAT 1.25V Temperature 25°C
Parameter Volume Control
Volume Control Resistance
Symbol
Conditions
Units
Two-terminal connection Three-terminal connection
1000
Volume Control Range
Input
Logic Voltage Logic Voltage
Output
Standby Pull Current Sync Pull Current Logic Current (Pull Down) Logic Current (Pull Synchronization Time (Synchronization Pulse Width) TSYNC TSYNC TSYNC TSYNC TSYNC TSYNC TSYNC TSYNC Baud Baud Baud Baud Baud Baud Baud Baud 29.76 14.88 7.44 3.72 1.86 62.5 31.25 15.63 7.81 3.91 1.95 32.81 16.41 8.20 4.10 2.05
Input
Pull Down Resistance Logic Voltage Rising Edge Threshold Falling Edge Threshold Hysteresis VREG 0.25 0.69 0.45 0.24
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GA3219 GA3218 GA3217 Preliminary Data Sheet
Table 3-1: Electrical Characteristics (Continued)
Conditions: VBAT 1.25V Temperature 25°C
Parameter Input
Pull Down Resistance Logic Voltage Rising Edge Threshold Falling Edge Threshold Hysteresis
Symbol
Conditions
Units
VREG 0.25
0.69 0.45 0.24
Typical Applications
resistors ohms, capacitors farads unless otherwise stated.
TONE GENERATOR
CIRCUITRY
VOLTAGE REGULATOR
MEMORY SELECT POST BIQUAD FILTERS CROSS FADER
PEAK CLIPPER
HBRIDGE
FILTER
MIC/TELECOIL COMPENSATION
BIQUAD FILTERS FEEDBACK CANCELLER
AGCO
VOLUME CONTROL
POST BIQUAD FILTERS CONTROL WIDEBAND GAIN
200k
FREQUENCY BAND ANALYSIS PROGRAMMING INTERFACE bands FREQUENCY BAND SYNTHESIS WDRC (1,2,4 channels) Noise Reduction (128 bands) CLOCK GENERATOR Graphic bands) EEPROM
Figure 4-1: Test Circuit
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GA3219 GA3218 GA3217 Preliminary Data Sheet
TONE GENERATOR
CIRCUITRY
VOLTAGE REGULATOR
MEMORY SELECT POST BIQUAD FILTERS CROSS FADER
PEAK CLIPPER
HBRIDGE
Knowles Sonion zero-bias receiver
MIC/TELECOIL COMPENSATION
BIQUAD FILTERS FEEDBACK CANCELLER
AGCO
VOLUME CONTROL
POST BIQUAD FILTERS CONTROL WIDEBAND GAIN
FREQUENCY BAND ANALYSIS PROGRAMMING INTERFACE bands FREQUENCY BAND SYNTHESIS WDRC (1,2,4 channels) Noise Reduction (128 bands) CLOCK GENERATOR Graphic bands) EEPROM
Figure 4-2: Typical Application Circuit
CS44
Rear Zero Biased Receiver Front
switch (N.O.) T-coil
Figure 4-3: Typical Hearing Instrument Assembly Diagram
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GA3219 GA3218 GA3217 Preliminary Data Sheet
Venture Overview
Venture Digital system with adaptive algorithms that Voyageurhardware platform. This hardware platform combination core high fidelity audio CODEC. well, thinSTAX packaging provides easy integration into wide range applications from BTE. audio functions implemented CODEC include tone generation, peak clipping cross fading between audio paths. core implements FRONTWAVE directional processing, programmable filters, adaptive algorithms, compression, wideband gain, volume control. adaptive algorithms include Adaptive Noise Reduction Adaptive Feedback Cancellation. Adaptive Noise Reduction reduces audible noise distortion manner while preserving perceived speech levels. Adaptive Feedback Canceller reduces acoustic feedback while offering robust performance against pure tones. well, Venture contains security features protect clients' Intellectual Property against device cloning software piracy. Venture utilizes power capabilities Voyageur deliver advanced features enhanced performance previously unavailable product class. This data sheet part documents available this product. Please refer "Getting Started with Venture Digital", document #33350, list other documents.
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GA3219 GA3218 GA3217 Preliminary Data Sheet
Signal Path
There main audio input signal paths. first path contains Front Microphone second path contains Rear Microphone, Telecoil Direct Audio input selected programmable MUX. front microphone input intended main Microphone audio input single microphone applications. FRONTWAVE operation, multimicrophone signal used produce directional hearing instrument response. audio inputs buffered, sampled converted into digital form using dual converters. digital outputs converted into 32kHz 16kHz, 20-bit digital audio signal. Further filter blocks process front microphone rear microphone signals. biquad filter used match rear microphone's gain that front microphone. After that, another filter used provide adjustable group delay create desired polar response pattern during calibration process. Telecoil mode gains trimmed during Cal/Config process compensate microphone/telecoil mismatches. FRONTWAVE block followed four cascaded biquad filters: "pre1", "pre2", "pre3" "pre4". These filters used frequency response shaping before signal goes through channel adaptive processing. channel adaptive processing consists frequency band analysis channel WDRC logarithmically spaced band frequency shaping (graphic frequency band adaptive noise reduction frequency band synthesis phase cancellation adaptive feedback reduction
After processing signal goes through more biquad filters, "post1" "post2", Wideband Gain Volume Control. These biquad filters followed AGCo block, more biquad filters, post3" "post4", Peak Clipper. last stage signal path H-bridge.
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GA3219 GA3218 GA3217 Preliminary Data Sheet
Functional Block Description
Adaptive Feeback Canceller
Adaptive Feedback canceller (AFC) reduces acoustic feedback forming estimate hearing feedback signal then subtracting this estimate from hearing input. Therefore forward path hearing affected. Unlike adaptive notch filter approaches, Venture's does reduce hearing aid's gain. based time-domain model feedback path. Venture's second generation exhibits greatly improved resistance tonal inputs.
Feedback path
Estimated feedback
Figure 7-1: Adaptive Feedback Canceller (AFC) block diagram
Adaptive Noise Reduction
noise reduction algorithm built upon high resolution 128-band filterbank enabling precise removal noise. algorithm monitors signal noise activities these bands, imposes carefully calculated attenuation gain independently each bands. noise reduction gain applied given band determined combination three factors: Signal-to-Noise Ratio (SNR) Masking threshold Dynamics band.
each band determines maximum amount attenuation that will applied band; poorer SNR, greater amount attenuation. Simultaneously, each band, masking threshold variations resulting from energy other adjacent bands taken into account. Finally, noise reduction gain also adjusted take advantage natural masking 'noisy' bands speech bands over time. Based this approach, only enough attenuation applied bring energy each 'noisy' band just below masking threshold. This prevents excessive amounts attenuation from being applied thereby reduces unwanted artifacts
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GA3219 GA3218 GA3217 Preliminary Data Sheet audio distortion. Noise Reduction algorithm efficiently removes wide variety types noise, while retaining natural speech quality level.
Converters
system's converters 2nd-order sigma-delta modulators, which operate 2.048MHz sample rate. system's audio inputs pre-conditioned with antialias filtering programmable gain pre-amplifiers. These analog outputs over sampled modulated produce two, 1-bit pulse density modulated (PDM) data streams. digital data then decimated down pulse-code modulated (PCM) digital words system sampling rate 32kHz. comprised digital, 3rd-order sigma-delta modulator H-bridge. modulator accepts audio data from path converts into 32-times over-sampled, 1-bit data stream, which then supplied H-bridge. H-bridge specialized CMOS output driver used convert 1-bit data stream into low-impedance, differential output voltage waveform suitable driving zero-biased hearing receivers.
Head Room Expander
Venture enhanced Head Room Expander (HRX) circuit, which increases input dynamic range Venture without audible artifacts. This accomplished dynamically adjusting preamplifier's gain post-A/D attenuation depending input level.
FRONTWAVE Directionality
FRONTWAVE block provides resources necessary implement directional microphone processing. block accepts inputs from both front rear microphone provides synthesized directional microphone signal output. directional microphone output obtained delaying rear microphone signal subtracting from front microphone signal. Various microphone response patterns obtained adjusting time delay. FRONTWAVE circuit also provides fixed filter compensating sensitivity frequency response differences between microphones. filter parameters adjusted during product calibration. dedicated biquad filter following FRONTWAVE block been allocated frequency equalization compensate 6dB/octave roll frequency response that occurs directional mode. amount frequency equalization that applied determined during product calibration. Gennum recommends using matched microphones with FRONTWAVE, although calibration fully possible using unmatched microphones.
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GA3219 GA3218 GA3217 Preliminary Data Sheet
Channel Processing
Figure represents characteristic independent channel processing. curve divided into four main regions: input level expansion (squelch) region input level linear region compression region high input level linear region (return linear)
High Level Gain
OUTPUT LEVEL (dBV)
-100 -120 -110 -100
Level Gain
Compression Ratio Upper Threshold
Lower Threshold Squelch Threshold
INPUT LEVEL (dBV)
Figure 7-2: Independent Channel Curve Flexibility
characteristic channel processing adjusted ways: squelch threshold (SQUELCHTH) level gain (LLGAIN) lower threshold (LTH) high level gain (HLGAIN) upper threshold (UTH) compression ratio (CR)
ensure that characteristics continuous necessary limit adjustment maximum four available five parameters. During Parameter creation necessary select four parameters user adjustable fixed) allow parameter calculated. squelch region within each channel implements level noise reduction scheme (1:2 expansion ratio) listener comfort. This scheme operates quiet listening environments (programmable threshold) reduce gain very levels. number compression channels programmable ARKonline
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Telecoil Path
telecoil input calibrated during Cal/Config process. compensate telecoil/microphone frequency response mismatch, first order filter with 500Hz corner frequency implemented. Through ARKonline possible implement telecoil compensation filter with adjustable corner frequency. accommodate gain mismatch, telecoil gain adjusted match microphone gain 500Hz 1kHz (default) selectable ARKonline. There also telecoil gain adjustment parameter, which enabled ARKonline that will allow manual adjustment telecoil gain compensation.
Graphic Equalizer
Venture band graphic equalizer. bands spaced logarithmically, each provides 24dB gain adjustment increments.
Biquad Filters
Additional frequency shaping achieved configuring generic biquad filters. transfer function each biquad filters follows: H(z) Note that coefficient hard-wired always coefficients each bits length include sign bit, left decimal point, bits right decimal point. Thus, before quantization, floating-point coefficients must range -2.0 quantized with function: round(x 214) After designing filter, quantized coefficients entered into PreBiquads PostBiquads Interactive Data Sheet. coefficients defined transfer function above. parameters meta0 meta1 have effect signal processing, used store additional information related biquad with which they associated. underlying code product components automatically checks filters system stability (that poles have within unit circle) before updating graphs screen programming coefficients into hybrid. Interactive Data Sheet receives exception from underlying stability checking code, will automatically disable biquad being modified display warning message. When filter made stable again, re-enabled.
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GA3219 GA3218 GA3217 Preliminary Data Sheet Note also that some configurations some these filters used product component microphone/telecoil compensation, low-frequency etc. this case, coefficients user enters into will ignored filter designed software will programmed instead. more information filter design refer Biquad Filters PARAGONDigital Hybrid information note, Document 20205.
7.10 Volume Control
volume control (VC) either external programmable. programmed external operation, variable resistor should connected 9bit converter. external configured work with either two-terminal 200k variable resistor three-terminal 0.1M variable resistor. two-terminal configuration connected between input three-terminal configuration between GND, Vreg input. using terminal must calibrated before use. Calibration necessary with three terminal connection. Hysteresis built into Volume Control circuitry prevent unintentional volume level toggling. taper potentiometer recommended that gain would linear with potentiometer rotation. 42dB range.
7.11 AGCo Peak Clipper
output compression-limiting block (AGCo) output limiting circuit whose compression ratio fixed threshold level programmable. AGCo module programmable attack release time constants. AGCo Venture optional adaptive release functionality. When this function enabled release time varies depending environment. general terms release time becomes faster environments where average level well below threshold only brief intermittent transients exceed threshold. Conversely, environments where average level close AGCo threshold release time applied portions signal exceeding threshold longer. result effective distortion output limiter that clamps down very quickly momentary transients reacts more smoothly loud environments minimize compression pumping artifacts. programmed release time longest release time applied while fastest release time times faster than this. example release time 128ms selected fastest release time applied AGCo block 8ms. added flexibility, Venture also Peak Clipper block.
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7.12 Memory Select Switches
There two, two-pole Memory Select switches available Venture, which allows user tremendous flexibility switching between configurations. These switches either momentary static configurable either pull-up pull-down through settings IDS. four memories configured Venture. Memory must always valid. memory select options selectable settings IDS.
7.12.1 Momentary Switch
This mode uses single momentary switch (Pin change memories. Using this mode will cause part start Memory whenever button pressed next valid memory will loaded. When user last valid memory, button press will cause memory loaded. This mode programming "MSSMode" parameter "Momentary" "Donly" "disabled". Examples valid memories ABCDABCDA. valid memories ABCABCA. valid memories ABABA. valid memories AAA.
7.12.2 Momentary Switch Static Switch (jump last memory)
This mode uses static switch (Pin momentary switch (Pin change memories. static switch OPEN, part will start memory will behave like momentary with exception memory will used. static switch HIGH, part will automatically jump memory (this will happen startup during normal operation). this setup, momentary switch's state ignored. This prevents memory select beeps from occurring. When OPEN, part will load last select memory. This mode programming "MSSMode" parameter "Momentary" "Donly" "enabled". Examples OPEN there valid memories: ABCABCA. OPEN there valid memories: ABABA. HIGH:
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Table 7-1: Dynamic example with valid memories
momentary switch toggled, OPEN, HIGH Memory
7.12.3 Static Switch
This mode uses static switches change memories. Table describes which memory selected depending state switches. this mode possible jump from memory other memory simply changing state both switches. both switches changed simultaneously then transition will smooth, otherwise, switch changed then other, part will transition intermediate memory before reaching final memory. part will start whatever memory switches selecting. memory invalid part will default memory This mode programming "MSSMode" parameter "static" "Donly" "disabled".
Table 7-2: Memory selected Static Switch mode
OPEN HIGH OPEN HIGH
OPEN OPEN HIGH HIGH
Memory
valid, otherwise valid, otherwise valid, otherwise
7.12.4 Static Switch Static Switch (jump last memory)
This mode uses static switches change memories. Unlike previous example, this mode will switch last valid memory when static switch HIGH. This means that this mode will only maximum three memories (even four valid memories programmed). Table describes which memory selected depending state switches. This mode programming "MSSMode" parameter "static" "Donly" "enabled".
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Table 7-3: Memory selected Static Switch Static Switch (jump last memory) mode
OPEN HIGH OPEN HIGH
OPEN OPEN HIGH HIGH
Memory
valid, otherwise
this mode possible jump from memory other memory simply changing state both switches. both switches changed simultaneously then transition will smooth, otherwise, switch changed then other, part will transition intermediate memory before reaching final memory. When HIGH, state switch ignored. This prevents memory select beeps from occurring when switching when HIGH. part will start whatever memory switches selecting. memory invalid, part will default memory
7.13 Audible Memory Change Indicator
Venture programmed produce tones indicate memory change. Using Interactive Data Sheet Venture configured either enable disable Memory Change Indicator. When Memory Change Indicator enabled, there option have single beep each memory change multiple beeps. amplitude frequency memory change tone selected independent Tone Generator settings individually selected each memory. When memory change multiple beep enabled memory change tone enabled, then during memory change operation selected tone will beep code indicate which memory been selected. beep sequence will 160ms followed 160ms time between beeps. memory change beeping code deciphered Table 7-4.
Table 7-4: memory change beeping code Selected Memory
Number Beeps
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7.14 Tone Generator
programmable tone generator capable producing programmable tones. Upon reception tone enable instruction, Venture connects output tone generator input converter. programmed tone then output until tone disable instruction issued. When disabled, normal audio signal again connected.
7.15 Cross Fader
minimize potential loud transients when switching between memories, Venture uses cross fader block. When memory changed, audio signal faded out, followed memory select indicator beeps enabled), after switching next memory, audio signal faded back cross fader also used when turning Tone Generator off, during programming.
7.16 Power-On/Power-Off Behavior Battery Indicator
During power-on, Venture hybrid held reset state until supply voltage (Vb) reaches turn-on threshold. small portion hybrid's internal control logic turns monitors voltage determine supply stable. Once supply stable, entire hybrid activated loads configuration. Finally, audio output turns smoothly transitioning expected output level. During normal operation, when battery condition (below turn threshold) detected, Venture hybrid sends series seven beeps (each beep 512ms 512ms OFF) indicate battery low. This will repeat every five minutes until device reaches turn-off threshold. battery threshold programmable between 1.0V 1.2V 10mV increments. drops below turn-off threshold then Venture hybrid returned reset state audio output muted. After reset battery sudden supply transient, recovery behavior Venture determined selectable reset mode through ARKonline.
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GA3219 GA3218 GA3217 Preliminary Data Sheet There four selectable reset modes follows: Shallow-reset mode, which after battery shutdown transient shutdown, will allow Venture hybrid immediately restart when supply voltage rises above turn-ON threshold. device will restart memory that last active when shut down occurred. summary, device will function until supply voltage drops below turn-OFF threshold, will recover when device rises above turn-ON threshold again. Deep-reset mode, which after battery shutdown transient shutdown, will allow Venture hybrid restart. Once shut down occurs (i.e. once supply voltage drops below turn-OFF threshold), device remains until supply voltage drops below approximately 0.3V subsequently rises above turn-ON threshold. order supply drop below 0.3V, battery should disconnected. Upon reconnecting battery (preferably battery) supply voltage will rise above turn-ON threshold, subject supply being stable, device will restart. Mixed mode, which combination modes device starts shallow-reset mode initially, then changes over deep reset mode after five minutes. Transient reboot mode (recommended), which more advanced combination modes plus some additional intelligence. device starts shallow-reset mode initially, that after battery shutdown transient shutdown, device immediately restarts when supply voltage rises above turn-ON threshold. Once device restarts, deep-reset mode applied device operates memory that last active when shut down occurred. Additionally, maximum output level reduced through reduction AGCo peak clipper. This operating condition defined transient reboot mode. device operates transient reboot mode (meaning deep-reset mode maximum output reduction applied) while monitoring supply voltage. supply voltage remains above turn-on threshold least seconds, device allowed exit transient reboot mode. device returns shallow-reset mode maximum output restored. Generally, battery shutdown transient shutdown that occurs while shallow-reset mode while shallow-reset mode component mixed mode transient reboot mode) will result Venture hybrid restarting into memory that last active when shut down occurred. Venture hybrid this memory restart capability three memories. restart memory beyond first three memories will cause device restart initial memory, similar behavior when battery first connected. transient reboot mode described above also applies three memories. additional memories will shallow-reset mode behavior, will restart initial memory after shutdown. above reset modes, Venture hybrid configured through ARKonline reduce gain battery voltage drops. When supply voltage falls below battery threshold, battery tones will emitted wideband gain will reduced 3dB. battery voltage continues drop, battery tones will continue wideband gain will continue reduced. Once turn-OFF threshold reached, device will shut down.
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7.17 Software Security
Venture incorporates security features protect device from cloning against software piracy. These features are: protection password this prevents third party from using reconfigure parts. Hybrid authentication 128-bit fingerprint identify parts application software this prevents third party from cloning device's EEPROM, since fingerprint overwritten. Special functions used fitting software reject parts that match expected fingerprint. This will prevent piracy fitting software. hybrid pairing using software match product libraries with client software. part "locked" manufacturing time that will only communicate with library programmed with. This prevents third party from potentially upgrading device with different library other application software. Full software support provided every stage development from design manufacturing fitting. Please refer Getting Started with Guide, document #27217.
7.18 Communication
Venture programmed using industry standard programming boxes. During parameter changes main audio signal path hybrid temporarily muted using cross fader avoid generation disturbing audio transients. Once changes complete, main audio path reactivated. changes made during programming will lost power-off unless they explicitly burned EEPROM memory. Improvements have been made software Venture, which will increase communication speed. Certain parameters ARKonline selected such reduce number pages that need read out.
7.19 Power Management
Venture designed accommodate high power applications. ripple supply cause instantaneous reduction battery's voltage, potentially disruption circuit's function. Venture hybrids have separate power supply ground connections output stage. This allows hearing instrument designers accommodate external filters order minimize ripple from supply line. Reducing this ripple greatly improves stability circuit prevents unwanted reset circuit caused spikes supply line. more information properly designing filter reduce supply ripple, please refer information note Using GB3211 PARAGON Digital High Power Applications Initial Design Tips, document #24561.
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GA3219 GA3218 GA3217 Preliminary Data Sheet
Package Dimensions
0.215 (5.46)
0.124 (3.15)
GA3219 XXXXXX
0.070 (1.78)
0.026 (0.660)
0.016 (0.406)
Dimension units inches. Dimensions parentheses millimetres, converted from inches include minor rounding errors. 1.0000 inches 25.400mm Dimension tolerances: ±0.005 (±0.13) unless otherwise stated. Work order number: XXXXXX This Hybrid designed either point-to-point manual soldering reflow according Gennum's reflow process (Information Note 521-45).
Figure 8-1: Package dimensions
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GA3219 GA3218 GA3217 Preliminary Data Sheet
Location
Position
-59.25 -91.5 -124 -154.25 -183.5 -171.25 -182.25 -147 -113.75 -84.5 -56.25 -27.25 -12.75
Dimensions
-5.75 -5.75 -8.5 -5.75 -1.75 -1.75 33.75 66.5 71.5 66.5 73.25 73.25 37.25
Xdim (MIL)
20.5 21.5 41.5 19.5 20.5 18.5 18.5 43.5
Ydim (MIL)
26.5 26.5 26.5 34.5 34.5 16.5 35.5 35.5 16.5
-0.737 -1.505 -2.324 -3.150 -3.918 -4.661 -4.350 -4.629 -3.734 -2.889 -2.146 -1.429 -0.692 0.013 -0.324
-0.146 -0.146 -0.216 -0.146 -0.044 -0.044 0.857 1.689 1.816 1.689 1.930 1.930 1.861 2.007 0.946
Xdim (mm)
0.457 0.508 0.521 0.610 0.483 0.546 0.432 1.054 0.495 0.660 0.521 0.457 0.470 0.470 0.432 1.105
Ydim (mm)
0.965 0.673 0.673 0.533 0.673 0.876 0.876 0.419 0.737 0.991 1.245 0.762 0.762 0.902 0.902 0.419
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Revision History
Version
134601 134970 135826
Date
October 2004 December 2004 February 2005
Changes Modifications
document. Updated Preliminary Data Sheet. Hybrid pads dimensions changed.
CAUTION
ELECTROSTATIC SENSITIVE DEVICES OPEN PACKAGES HANDLE EXCEPT STATIC-FREE WORKSTATION
DOCUMENT IDENTIFICATION
PRELIMINARY DATA SHEET
product preproduction phase specifications subject change without notice.
GENNUM CORPORATION
Mailing Address: P.O. 489, Stn. Burlington, Ontario, Canada Shipping Address: Fraser Drive, Burlington, Ontario, Canada Tel. (905) 632-2996 Fax. (905) 632-5946
GENNUM JAPAN CORPORATION
Shinjuku Green Tower Building 27F, 6-14-1, Nishi Shinjuku, Shinjuku-ku, Tokyo, 160-0023 Japan Tel. (03) 3349-5501, Fax. (03) 3349-5505
GENNUM LIMITED
Long Garden Walk, Farnham, Surrey, England Tel. (0)1252 (0)1252 Gennum Corporation assumes liability errors omissions this document, circuits devices described herein. sale circuit device described herein does imply patent license, Gennum makes representation that circuit device free from patent infringement. GENNUM logo registered trademarks Gennum Corporation. Copyright 2004 Gennum Corporation. rights reserved. Printed Canada. www.gennum.com
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